My 40 plus years in the painting, drywall and all kinds of challenging home
repairs have always led to solutions that may not appear on a product label.
Painting over a wallpapered surface can be a successful project. Removing
wallpaper can be a messy task and can create more work than necessary. My
process that works is: I inspect the wallpaper for any loose seams or bubbles. I
remove the edges by tearing off the loose edges until the area comes to a sound
area. I cut out the bubbles with a razor knife being careful to just remove the
bubbled areas. The next step is to prime the entire wallpapered surface with an
oil base primer. I have used some water based primers with success it I always
test them first to see if the wallpaper or teared off areas cause the paper to
loosen or bubble. Kilz 3 is one of late that I have used with success after
testing. After the primers has thoroughly dried I apply joint compound over the
vertical seams and areas where the loose seams and bubbles were removed I start
with a 6 inch broad knife on the first coat. Let dry. I skim the second coat of
compound with a 8 or 10 inch and fish with a 14 inch kinfe on the final coat. I
do not sand between coats, only scraping lightly with a broad knife to remove
any raise edges. After I am pleased with the compound being smooth I sand
lightly or use a very damp cloth wrapped around a sanding sponge block to
eliminate drywall dust. The damp cloth and sanding block is a little tricky but
once you get results without all the dust it's worth it. Once all the area are
dry and smooth I like to prime the wall with a best quality drywall primer and
follow up with my finish coat of first quality. Sounds like a lot of steps but
each one goes quickly and eliminates the big mess of removing wallpaper and
repairing gouged out places that scrapers have made. An additional step that I
do is that I caulk the perimeter edges and corners with a good siliconized latex
caulk or use a product called Grab made by Loctite. This is my Tested Tried &
True method of painting over wallpaper.
On Sun, 8 Dec 2019 01:14:02 +0000, Tested Tried &True
It is sure easier than repairing micro-cracks and other hidden defects
on an old plaster wall!!!! And on drywall walls that were papered frpm
new and therefore not neccesarily finished to the best finish. If a
drywall wall was not properly primed before papering you are NOT going
to get the paper off without damaging the paper coat of the drywall no
matter HOW carefull you are.
Just don't try paintiung over the wallpaprer with a water based latex
without the oil based or KILZ primer first!!!!!!! Bubble city!!
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